From the home screen of the Samsung Galaxy S8 Android smartphone, open the Applications menu and from there the settings of the Android system.
Scroll down the menus and select "Advanced features". Here you will find many features including "fingerprint gestures".
Open the submenu and activate the option using the cursor. Now, if you pass the finger sensor from top to bottom, the status bar will open. If you swipe the sensor from the bottom up, the status bar will close.
Now you know exactly how to change the fingerprint sensor function to enable and disable the notification bar on Samsung Galaxy S8.